Audiovox AX-900 - Manual (Page 12)

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Purple w/ White Trace Wire: Tachometer Input Signal
This wire will continually monitor the engine's tach rate while the unit is under power of the Remote Start
module. This wire will be routed to the vehicle ECM tach input or through the firewall into the engine
compartment and connect to the negative side of the ignition coil. This Remote Start unit learns the tach
rate of the vehicle and in most cases will operate properly from one multi coil pack regardless of the number
of cylinders. If the vehicle has a single coil unit for each cylinder, it may be necessary to connect this wire
to more than one cylinder for proper tach reference. See multi coil wiring detail shown later in this manual
for additional information.
Black Wire: Chassis Ground Source
Connect the Black wire to a known vehicle ground source or to a solid clean metal part of the chassis. Be
certain to remove any paint or grease and secure this wire with a self tapping screw and ring terminal.
Chassis Ground Connection Detail
Brown w/ Red Trace Wire: Positive Inhibit Input + Trigger When Armed
This wire provides an instant shutdown for the Remote Start Control module whenever it gets + 12 volts
and triggers the alarm when armed. If the Brake lights switch in the vehicle switches + 12 volts to the
brake light circuit, connect this wire to the output side of the brake switch. This will allow the Remote Start
to shut down if an attempt is made to operate the vehicle without the key while running under the control
of the Remote Start. In most vehicles, in order to shift into gear, the brake pedal must be depressed. The
brake input will in turn cause the remote start unit to shut off. See detail in the following diagram for wiring
the brake light circuit.
Brake Switch Positive Shutdown Detail